کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8188628 | 1528840 | 2013 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Search for anomalous production of highly boosted Z bosons decaying to μ+μâ in proton-proton collisions at s=7 TeV
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ+μâ. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fbâ1 recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeV are excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeV are excluded, even if the excited quarks do not couple to gluons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 722, Issues 1â3, 13 May 2013, Pages 28-47
Journal: Physics Letters B - Volume 722, Issues 1â3, 13 May 2013, Pages 28-47